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The image above represents a mountain and the crustal root beneath that mountain. What will happen to the base of the mountain’s crustal root as elevation increases due to crustal thickening?

A. The base of the crustal root will move down within the mantle

B. The base of the crustal root will move up within the mantle

C. The base of the crustal root will not change size or position

bold = correct answer

Question Identifier: GCI_2011_053
Designed for: Non-Science Majors
Primary Author(s): M. Malone
Contributing Author(s): E.M. Geraghty Ward, J. Libarkin
Misconception's Reference:
Notes: Modified to focus on motion of the crustal root base.